Axl Rose performs at Queen Elizabeth Olympic Park on Saturday in London. Photograph: Chiaki Nozu/Getty Images Axl Rose admits having AC/DC withdrawals already   Twitter — Even though Axl Rose is less than 48 hours away from the Guns N’ Roses summer stadium tour the singer is already missing his gig with AC/DC. Rose took to social media earlier this week tweeting; “I miss singing ACDC!!”  Rose also added a crying, an upset and a smiling[…]